78123036 has 24 divisors (see below), whose sum is σ = 183075984. Its totient is φ = 25928320.

The previous prime is 78122987. The next prime is 78123037. The reversal of 78123036 is 63032187.

It is a super-2 number, since 2×78123036² = 12206417507714592, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 78122994 and 78123012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78123037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11175 + ... + 16766.

It is an arithmetic number, because the mean of its divisors is an integer number (7628166).

Almost surely, 2^78123036 is an apocalyptic number.

It is an amenable number.

78123036 is an abundant number, since it is smaller than the sum of its proper divisors (104952948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78123036 is a wasteful number, since it uses less digits than its factorization.

78123036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28181 (or 28179 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 78123036 is about 8838.7236635161. The cubic root of 78123036 is about 427.4904043535.

The spelling of 78123036 in words is "seventy-eight million, one hundred twenty-three thousand, thirty-six".